接地球の帯電金属球への移動速度が火花放電に及ぼす影響

概要

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In order to experimentally clarify the spark discharge that occurs when a grounded object moves toward a stationary charged object, spark length and the induced voltage in a magnetic probe that was 20 cm away from the spark discharge generation point were measured when a grounded metal sphere moved toward a stationary metal sphere whose charge potential was +10 kV. The moving speed of the grounded metal sphere ranged from 0.1 cm/s to 10 cm/s in this study. The experimental results showed that the average spark length decreased with an increase in the moving speed of the grounded metal sphere. On the other hand, the average value of the first peak of the induced voltage in the magnetic probe increased with an increase in the moving speed of the grounded metal sphere. The amplitudes in the amplitude spectra of the first peak of the induced voltage in the magnetic probe increased when the moving speed of the grounded metal sphere increased from 0.1 cm/s to 10 cm/s. The relation between the spark length and the induced voltage in the magnetic probe can be explained qualitatively by using an equation derived from the spark resistance formula proposed by Rompe and Weizel.